Translation and validation of the Portuguese version of the Keratoconus Outcomes Research Questionnaire (KORQ)

Abstract

Purpose: The purpose of this study is to translate and validate a Portuguese version of the Keratoconus Outcomes Research Questionnaire. The Keratoconus Outcomes Research Questionnaire is a psychometrically robust and valid instrumentused to assess the impact of keratoconus on activity limitations and symptoms. Methods: We performed a translation, cross-cultural adaptation, and validation of the Portuguese the Keratoconus Outcomes Research Questionnaire. language was performed by two independent native speaker translators, followed by an interdisciplinary panel evaluation of the translated version. The Portuguese version was then English by two independent native speakers, followed by evaluation and comparison with the original English interdisciplinary panel. For subsequent validation, the translated questionnaire was administered at results were compared in a concordance analysis. Results: translation into Portuguese and back-translation were determined to be correct. Thirty participants were enrolled in ± 7.56 years). Nine questions (31%) had almost perfect agreement (questions 3, 4, 5, 8, 18, 22, 27, (51.7%) had substantial agreement (questions 1, 2, 6, 7, 9, 26), 4 questions (13.8%) had moderate agreement (questions 10, 11, 19, and agreement (question 13). High-correlation coefficients w